Experimental Research on Effect Coefficient of Anchorage Layers of Shear-resistant Embedded Parts in Reinforced Concrete
Shear-resistant embedded parts are widely used in reinforced concrete components.Considering the uneven distribution of local stress between anchor bars and concrete along the direction of shear force, the specification defines the shear reduction factor of embedded parts when the number of layers is less than four.However, there are often more than four layers of anchor bars in actual projects.In this paper, through the shear capacity tests of 4 sets, 21 pairs, 42 pieces of embedded parts, the failure modes of shear-resistant embedded parts with multi-layer anchorage and related factors affecting the bearing capacity are studied.Tests have shown that the failure mode of shear embedded parts is related to the diameter of anchor bars.For embedded parts with smaller diameter of anchor bars, the concrete under anchor bars is first locally crushed, and then the anchors are sheared off.While the embedded parts with large diameter of anchor bars present the overall destruction of the concrete below the test piece.By changing the number of anchorage layers of the embedded parts, it is verified that the shear bearing capacity is basically not reduced due to the increase of the number of anchorage layers when the stiffness of the loading plate is sufficiently large.Through the finite element analysis, it is further proved that the main factor influencing the shear capacity of embedded parts of multi-layer anchorage is the stiffness of the loading plate rather than the number of anchor bar layers.
embedded parts number of anchorage layers effect coefficient experimental research ultimate bearing capacity
J.Jia A.Guo
China Aviation Planning and Design Institute (group) co.ltd., Beijing, China
国际会议
福州
英文
797-803
2018-11-04（万方平台首次上网日期，不代表论文的发表时间）